在纯T-SQL中生成ASP.Net Membership密码哈希

Question

我试图创建在ASP.Net成员资格系统默认的SHA-1密码哈希的纯T-SQL表示.理想情况下,我会得到的是:

UserName           Password              GeneratedPassword
cbehrens           34098kw4D+FKJ==       34098kw4D+FKJ==

注意:那里有伪造的base-64文本.我有base64_encode和解码函数正确往返.这是我的尝试,但不起作用:

SELECT UserName, Password, dbo.base64_encode(HASHBYTES('SHA1', dbo.base64_decode(PasswordSalt) +  'test')) As TestPassword FROM aspnet_Users U JOIN aspnet_membership M ON U.UserID = M.UserID

我尝试了很多关于主题的变化,但没有用.我需要在纯T-Sql中执行此操作; 涉及控制台应用程序或类似的东西将使工作翻倍.

因此,如果有人能提供从ASP.Net会员资料中复制该密码的语法应该是什么,我将非常感激.

Answer 1

我写了一个哈希存储过程,通过反向引导C#代码从这里ASP.NET身份默认密码哈希,它是如何工作的,它是否安全？从这里有一些很棒的PBKDF2 SQL函数是否有PBKDF2的SQL实现？

首先创建这两个函数取自是否有一个SQL实现的PBKDF2？

create FUNCTION [dbo].[fn_HMAC]
(
        @hash_algorithm varchar(25),
        @key VARCHAR(MAX),
        @message VARCHAR(MAX)
)
RETURNS VARCHAR(MAX)


AS
BEGIN
    --HASH key if longer than 16 characters
    IF(LEN(@key) >64)
        SET @key = HASHBYTES(@hash_algorithm,@key)


    DECLARE @i_key_pad VARCHAR(MAX), @o_key_pad VARCHAR(MAX), @position INT
        SET @position = 1
        SET @i_key_pad = ''
        SET @o_key_pad = ''

    --splice ipad & opod with key
    WHILE @position <= LEN(@key)
       BEGIN
        SET @i_key_pad = @i_key_pad + CHAR(ASCII(SUBSTRING(@key, @position, 1)) ^ 54) 
        SET @o_key_pad = @o_key_pad + CHAR(ASCII(SUBSTRING(@key, @position, 1)) ^ 92) 
        SET @position = @position + 1
       END 

    --pad i_key_pad & o_key_pad
        SET @i_key_pad = LEFT(@i_key_pad + REPLICATE('6',64),64)
        SET @o_key_pad = LEFT(@o_key_pad + REPLICATE('\',64),64)


RETURN HASHBYTES(@hash_algorithm,CONVERT(VARBINARY(MAX),@o_key_pad) + HASHBYTES(@hash_algorithm,@i_key_pad + @message))

END

GO

和

CREATE function [dbo].[fn_PBKDF2] 
(
@hash_algorithm varchar(25),
@password varchar(max),
@salt varchar(max),
@rounds int,
@outputbytes int
)
returns varchar(max)
as
begin

declare @hlen int
select @hlen = len(HASHBYTES(@hash_algorithm, 'test'))
declare @l int 
SET @l = (@outputbytes +@hLen -1)/@hLen
declare @r int 
SET @r = @outputbytes - (@l - 1) * @hLen
declare @t varchar(max), @u varchar(max), @block1 varchar(max)

declare @output varchar(max) 
SET @output = ''

declare @i int 
SET @i = 1
while @i <= @l
    begin
    set @block1 = @salt +cast(cast(@i as varbinary(4)) as varchar(4))
    set @u = dbo.fn_HMAC(@hash_algorithm,@password,@block1)
    set @t = @u

    declare @j int 
    SET @j = 1
    while @j < @rounds
        begin
        set @u = dbo.fn_HMAC(@hash_algorithm,@password,@u)


        declare @k int 
        SET @k = 0 
        DECLARE @workstring varchar(max) 
        SET @workstring = ''
        while @k < @hLen
            begin
            set @workstring = @workstring + char(ascii(substring(@u,@k+1,1))^ascii(substring(@t,@k+1,1)))
            set @k = @k + 1
            end
        set @t = @workstring
        set @j = @j + 1
        end

        select @output = @output + case when @i = @l then left(@t,@r) else @t end
    set @i = @i + 1
    end

  return master.dbo.fn_varbintohexstr(convert(varbinary(max), @output ))


end
GO

然后创建存储过程以生成哈希密码

CREATE PROCEDURE [dbo].[EncryptPassword2]
    @passwordIn AS VARCHAR(MAX),
    @passwordOut VARCHAR(max) OUTPUT
AS

        -- Generate 16 byte salt
    DECLARE @saltVarBin VARBINARY(max)
    SET @saltVarBin = (SELECT CAST(newid() AS binary(16)))

    -- Base64 encode the salt
    DECLARE @saltOut VARCHAR(max)
    SET @saltOut = cast('' as xml).value('xs:base64Binary(sql:variable("@saltVarBin"))', 'varchar(max)')

    -- Decode salt to pass to function fn_PBKDF2
    DECLARE @decodedsalt varchar(max)
    SET @decodedsalt = convert(varchar(max),(SELECT CAST('' as xml).value('xs:base64Binary(sql:variable("@saltOut"))', 'varbinary(max)')))

    -- Build the password binary string from 00 + salt binary string + password binary string created by 32 byte 1000 iteration ORC_PBKDF2 hashing
    DECLARE @passwordVarBinStr VARCHAR(max)
    -- Identity V1.0 and V2.0 Format: { 0x00, salt, subkey } 
    SET @passwordVarBinStr = '0x00' + REPLACE(master.dbo.fn_varbintohexstr(@saltVarBin) + (SELECT dbo.fn_PBKDF2('sha1', @passwordIn, @decodedsalt, 1000, 32)),'0x','')
    -- Identity V3.0 Format: { 0x01, prf (UInt32), iter count (UInt32), salt length (UInt32), salt, subkey } (comment out above line and uncomment below line)
    --SET @passwordVarBinStr = '0x01000000010000271000000010' + REPLACE(master.dbo.fn_varbintohexstr(@saltVarBin) + (SELECT dbo.fn_PBKDF2('SHA2_256', @passwordIn, @decodedsalt,10000, 32)),'0x','')


    -- Convert the password binary string to base 64
    DECLARE @passwordVarBin VARBINARY(max)
    SET @passwordVarBin =  (select cast('' as xml).value('xs:hexBinary( substring(sql:variable("@passwordVarBinStr"), sql:column("t.pos")) )', 'varbinary(max)') from (select case substring(@passwordVarBinStr, 1, 2) when '0x' then 3 else 0 end) as t(pos))
    SET @passwordOut = cast(''as xml).value('xs:base64Binary(sql:variable("@passwordVarBin"))', 'varchar(max)')

RETURN

最后使用执行存储过程

DECLARE @NewPassword varchar(100)
DECLARE @EncryptPassword VARCHAR(max)

select @NewPassword = 'password12344'                                           

EXECUTE EncryptPassword2 @NewPassword, @PasswordOut = @EncryptPassword OUTPUT;

PRINT @EncryptPassword

请注意,对于SQL Server的更高版本,可能需要更改存储过程,因为这是专门为2005年编写的,我相信在以后的版本中转换为base64会有所不同.

Answer 2

如果您运行的是2005或更高版本,则可以创建CLR(.NET)UDF:

[SqlFunction(
  IsDeterministic = true, IsPrecise = true, 
  DataAccess = DataAccessKind.None,
  SystemDataAccess = SystemDataAccessKind.None
)]
public static string EncodePassword(string pass, string salt) {
  byte[] bytes = Encoding.Unicode.GetBytes(pass);
  byte[] src = Convert.FromBase64String(salt);
  byte[] dst = new byte[src.Length + bytes.Length];
  Buffer.BlockCopy(src, 0, dst, 0, src.Length);
  Buffer.BlockCopy(bytes, 0, dst, src.Length, bytes.Length);
  using (SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider()) {
    return Convert.ToBase64String(sha1.ComputeHash(dst));
  }
}

您需要在您的类中包含以下命名空间:

using Microsoft.SqlServer.Server;
using System.Data.SqlTypes;

班级必须公开.

构建.dll然后运行以下(每个要调用UDF的数据库)SQL语句:

sp_configure 'clr enabled', 1
GO
RECONFIGURE
GO

IF OBJECT_ID (N'dbo.EncodePassword', N'FS') IS NOT NULL
  DROP FUNCTION dbo.EncodePassword;    
IF EXISTS (SELECT name FROM sys.assemblies WHERE name='UDF')
DROP ASSEMBLY UDF

CREATE ASSEMBLY UDF FROM 'FULL_PATH_TO.dll' WITH PERMISSION_SET=SAFE    
GO

CREATE FUNCTION EncodePassword(
  @pass NVARCHAR(4000),
  @salt NVARCHAR(4000)
)
RETURNS NVARCHAR(4000)
-- return NULL if any input parameter(s) are NULL
WITH RETURNS NULL ON NULL INPUT
AS
EXTERNAL NAME UDF.[NAMESPACE.CLASSNAME].EncodePassword
GO

显然,将'NAMESPACE.CLASSNAME'替换为您的类的名称空间(如果有)和名称.并且您可能想要混淆输入参数和返回值大小.

然后用T-SQL调用UDF:

SELECT UserName,Password
,dbo.EncodePassword('PASSWORD', PasswordSalt) As TestPassword 
FROM aspnet_Users U 
JOIN aspnet_membership M ON U.UserID = M.UserID

适合我:)